Custom Pharmaceutical Peptide Impurities | Peptide Impurity Controls | Peptide Impurity Synthesis | Heterogeneous Mass Spectrometry | Science-Peptide
Meta Description
Need peptide impurity controls for method development or submission research? Science-Peptide's Custom Pharmaceutical Peptide Impurities synthesis service covers deletion peptides, oxidized peptides, disulfide mismatch peptides, etc. We provide MS/MS structure confirmation and support impurity profiling. Welcome to contact us.
Drug peptide impurities: you can't hide from them, you have to study them thoroughly
Why do you need Custom Pharmaceutical Peptide Impurities?
Anyone who works with peptide drugs knows that impurity research is an essential part of the filing process.No matter how pure the API is, there will always be a few impurities - missing peptides, oxidized peptides, isomers, disulfide mismatches, and polymerized peptides.
Regulators are watching the impurities: what is the structure? How much? What is the toxicity? Can they be kept within safe limits?
In order to answer these questions, the first thing you need to do is to get the control of the impurity. Otherwise, there is no standard sample for method development, no sample for toxicology study, and no clear information for declaration.
Custom Pharmaceutical Peptide Impurities is to do this: to synthesize the impurities that may be produced by your API, synthesize them according to the need, confirm the structure clearly, and take them to do the methodology validation, toxicology study, and stability indication.
What drug peptide impurities can we make?
Common impurity types
|
Impurity type |
Description |
The reasons for this |
|
missing peptide |
one or more amino acids less |
Insufficient coupling efficiency during synthesis |
|
Insert peptide |
More amino acids that shouldn't be there |
contamination or mis-coupling of amino acid raw materials |
|
truncated peptides |
One less segment from the N-side or the C-side |
termination of synthesis or incomplete cleavage |
|
oxidized peptides |
Met, Cys, and Trp were oxidized |
storage or process exposure to oxidizing agents |
|
deamidated peptides |
Deamidation of Asn and Gln to Asp and Glu |
acidic or alkaline conditions or high temperatures |
|
disulfide bond mismatch |
Cys pairing error |
Inadequate control of the oxidative folding process |
|
isomers |
Asp isomerization, D-type amino acids |
Racemization during synthesis or storage |
|
Aggregates |
dimers, multimers |
high concentrations or hydrophobic interactions |
|
modification-related impurities |
acetylation, incomplete glycosylation or over-modification |
Insufficiently selective modification reactions |
Custom Pharmaceutical Peptide Impurities?
1. We've been doing this for 20 years
Custom Pharmaceutical Peptide Impurities are synthetic in nature, but are much more demanding than common peptide synthesis. Impurities are often small in quantity, similar in structure, and difficult to separate. Over the years, we have helped our customers to synthesize many types of impurities, from the simplest missing peptide to the most difficult four pairs of disulfide bond mismatch, and we have successful cases.
2. Structural corroboration: MS/MS broken to pieces
What do you fear most when doing impurity control? The structure is not clearly confirmed, and then we take it for method development, and the sample itself is wrong.
We offer:
High Resolution Mass Spectrometry:Confirmation that the molecular weight is correct.
MS/MS secondary mass spectrometry (optional): break up the peptide and look at the fragment ions to confirm the position of the deletion, modification site, and disulfide bond pairing.
HPLC comparison: and main peak control to confirm retention time differences.
Co-injection: Co-inject with your API sample if necessary to confirm the impurity peak position.
I'll give you all the data, so you can use it when you write your declaration.
3. Purity: Customized for Impurity Studies
|
Purity level |
Applicable Scenarios |
|
Crude (70-85%) |
Pre-toxicity study screening to see if impurities are active or inactive |
|
Conventional pure (85-95%) |
methodology development, system applicability |
|
High purity (95-98%) |
quantitative controls, toxicology studies |
|
Ultrapure (>98%) |
structural confirmation, special requirements |
Each impurity peptide is accompanied by an HPLC and MS report, making the purity data transparent.
4. Volume flexibility: milligrams to grams
Method development: 1-5 mg is sufficient for systemic applicability.
Heterogeneous mass spectrometry studies: 5-20 mg, spiked for recovery, limit of quantification (LOQ) validation.
Toxicological studies: 50-500 mg, depending on impurity toxicity.
Control stock: grams for long-term use.
5. Methodology development support
Some of the impurities are too difficult to be separated, and we can't make a method even if we get the specimen. We can:
Provide suggestions for purification conditions (what column to use, what mobile phase).
Provide stability data (under what conditions impurities tend to degrade).
Work with you to optimize your analysis methods.
Custom Pharmaceutical Peptide Impurities
|
Research phase |
Uses |
The type of impurity required |
|
analytical method development |
System suitability, separation validation |
Absent peptides, oxidized peptides, deamidated peptides |
|
Heterogeneous mass spectrometry studies |
Qualitative quantification of impurities in APIs |
all impurities that may arise |
|
Toxicology studies |
Assessing the toxicity risk of impurities |
Focusing on impurities with a content of >0.15% |
|
Stability studies |
Determination of degradation products |
oxidation, deamidation, aggregates |
|
process optimization |
Evaluating process effects on impurity profiles |
process-related specific impurities |
|
Declaration of information |
Structural confirmation, impurity control reports |
Full data set, MS/MS corroboration |
Delivery and quality control
- Delivery: Lyophilized powder, centrifuge tubes or vials, protected by nitrogen.
- Accompanying documents: COA (HPLC purity + MS molecular weight confirmation), MS/MS structure confirmation mapping (optional), synthesis report (optional).
- Optional tests: peptide content, endotoxin, moisture, residual solvents, amino acid composition analysis.
- Customized Packaging: Packaged and labeled according to your requirements, different batches are available.
Before each Custom Pharmaceutical Peptide Impurities is sent out, it is reviewed to ensure that the structure is correct and the purity is up to standard.
Three real-life cases
Case 1: A generic pharmaceutical company's impurity control program
The client is developing a generic version of a marketed peptide and needs to synthesize 5 key impurities: 2 missing peptides, 1 oxidized peptide, 1 deamidated peptide, 1 disulfide bond mismatch peptide. We synthesized and validated these impurities according to ICH requirements and provided MS/MS data. The client used these impurities to successfully establish the analytical method and passed the issuance of the supplement.
Case 2: Toxicology Research Programs of Innovative Pharmaceutical Companies
Our client's peptide candidate is in the IND stage and needs to synthesize an oxidized peptide with a content of about 0.5% for toxicology studies. We synthesized 100 mg of the oxidized peptide with purity >95% and provided accelerated stability data to demonstrate that the impurity was stable in the formulation. The customer completed the toxicology study with this batch of samples.
Case 3: Method Development Support for Overseas Pharmaceutical Enterprises
The client's patent expired and the client was planning to develop a generic drug, but one of the impurities (deamidated isomer) could not be purchased as a control. We synthesized the target impurity and found two new impurities that had not been reported in the literature, and provided the data together. The client used these impurities to establish a complete spectrum of impurities, and the filing was approved in one go.
Talk about your impurity needs?
Whether you are doing method development, preparing toxicology studies, or lacking data for filing, you can talk to us. If you find Science-Peptide to do Custom Pharmaceutical Peptide Impurities, at least you don't need to look for specimens all over the world.
I need you to tell me:
Peptide sequences (or structural information) of APIs
What impurities are needed (missing, oxidized, mismatched, etc.)
How much (milligrams)
purity requirements
When do you want it?
Give you a feasibility assessment and quote within 24 hours.